There are usually several water outlets in the courtyard rockery.

The courtyard rockery should have at least two outlets, preferably four outlets. The hall of traditional houses will be designed as "four waters return to the hall", that is, rainwater drainage will not affect Feng Shui. The outlet of the rockery in the yard will not affect Feng Shui. Drainage ditches and sewers are the focus of geomantic exploration in Yangzhai. Generally speaking, the inflow of water is slow, and it is not allowed to enter directly. The water flowing out should be curved and affectionate. If it is sewage, it is not suitable to stay for a long time, but it is necessary to leave relevant columns at the water outlet, such as iron nets and curved heads of sand sinking wells (not to mention the effect of geomantic omen, which has a positive effect on preventing mosquitoes, rats, cockroaches and other pests from entering the house and protecting the environment), otherwise you can't walk straight.